Hina gang wanted to break BAAPS and they are successful but I feel Pun made his calculations too. If Akash is captain then he is immune and that means PunGi will be in danger of elimination in case they are nominated with celebs. So IMO he made sure one weak contender voting wise should be there so that they have a chance to get saved.
Vikas made sure Hiten becomes the captain. Since he, arshi & Shilpa had zero chances as voting power mostly lied with Hina & co. & their candidate was Hiten too. so he convinced the only voter who could have eliminated Hiten from captaincy.